3D printing system and method based on selective laser melting

Abstract

The invention provides a 3D printing system and method based on selective laser melting. A powder laying movement module conducts powder laying on a forming cylinder molten pool module; a laser scanning module is used for carrying out laser melting on the metal powder in the forming cylinder molten pool module; an airflow protection module provides inert protection gas during 3D printing; and an online monitoring module monitors product data and powder bed data in the forming cylinder molten pool module and data such as gas pressure and flow in the airflow protection module in real time, and controls work of the powder laying movement module, the laser scanning module and the airflow protection module according to the monitored data. The product and the powder bed are monitored in real time through the online monitoring module, and parameters of 3D printing of the next layer are adjusted according to the monitored result, so that abnormity can be found in time when the abnormity occurs in the 3D printing process of the product, the abnormity can be treated in time, and therefore, the SLM3D printing performance of the product is improved, and the problem of how to improve the SLM 3D printing quality is solved.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a 3D printing system and method based on selective laser melting. Background technique [0002] 3D printing (3DP) is a rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. 3D printing is often used to manufacture models in the fields of mold manufacturing and industrial design, and is gradually used in the direct manufacture of some products. There are already parts printed using this technology. Currently, 3D printing technology is used in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms and other fields . [0003] According to different printing technologies, 3D printing is di...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a 3D printing system and method based on selective laser melting, to at least solve the problems that the existing SLM 3D printing process cannot feedback the printing situation and optimize the printing parameter settings according to the feedback results, helping to reduce The internal residual stress of the molded product prevents deformation and cracking, improves the comprehensive mechanical properties and surface molding quality of the molded product, and improves the overall performance of the molded product

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